Aleitamento materno exclusivo em lactentes atendidos na rede pública do município de Joinville, Santa Catarina, Brasil

OBJECTIVES: to identify the prevalence of exclusive breastfeeding in children attending the public health system and its association with variables relating to the mother and the child. METHODS: cross-sectional study conducted in the course of the 2005 National Immunization Campaign, in the city o Joinville, State of Santa Catarina, Brazil. Carers for 889 children answered a questionnaire including questions about the mother and the child at the vaccination sites. Descriptive statistics and chi-square test were used to analyze data, with a level of significance of 5%. RESULTS: the observed prevalence for breastfeeding was 90.7%, 84.2% and 73.5%, in children under four, six and twelve months of age, respectively. Exclusive breastfeeding rates were 53.9% among children under four and 43.6% among those under six months. Use of pacifiers was significantly associated with the absence of exclusive breastfeeding both in children under four and in those under six months of age (p<0.001). Mother work outside home was associated with the absence of exclusive breastfeeding in children aged under six months (p=0.001). CONCLUSIONS: exclusive breastfeeding rates among infants under 12 months of age attending public health system were lower than those recommended by the World Health Organization. The use of pacifiers and the mother work may negatively influence exclusive breastfeeding.